Created attachment 47115 [details] I just hovered the menu entry I used to hide the toolbar. The toolbar's blank background's left afterwards. LibreOffice has at least two different ways to show and hide toolbars. Using the "View" > "Toolbars" menu is working quite well, but hiding a toolbar using it's contextmenu does not remove the background of the toolbar. I just attached two images. One showing a toolbar's contextmenu () and a second showing the blank background after hiding.
[Reproducible] with "LibreOffice 3.4.0RC1 – WIN7 Home Premium (64bit) English UI [OOO340m1 (Build:11)]". When you close the last docked toolbar in a line using context menu, the bar where the toolbar has been docked will not disappear as it does if you undock toolbar or make it invisible using menu 'View > Toolbars'). I remember we had something similar reported for the find bar,but I can't find the report.
Reproducible with LibO 3.4 rc1 on Ubuntu 10.04 x86
*** This bug has been marked as a duplicate of bug 36475 ***